Proportional sampler



Patented Jan. 26,1954

PROPORTIONAL SAMPLER Alvin S. Blum and Eugene V. Weiner, Long Beach, Calif.

Application June 19, 1952, Serial No. 294,421

4 Claims.

This invention relates to a proportional sam amount of that unknown quantity of fluid. The.

reverse-of this operation is also possible, that is,

an unknown quantity of fluid can be drawn from a flask, or the like, and this fluid in turn deposited within a container as long as this container has a greater volume than the original tube, or pipette, into which the fluid was originally drawn.

An object of our invention is to provide an inner and outer container, the volumes of which have a known relation to each other, and a means of opening or closing a connecting duct between these two containers.

Another object of our invention is to provide a pair of nested containers, the inner container having a seat in the outer container, and is rotatable on that seat to move a port into communication with the outer container in one position, to a draining position from an inner container.

Still another object of our invention is to provide a novel proportional sampler in which two tubular containers are concentrically mounted, the inner container being rotatable to communicate with the outer container, or to drain fluid from the inner container.

Still another object of our invention is to provide a proportional sampler of the character stated which is simple in construction, inexpensive to manufacture and effective in operation.

Other objects, advantages and features of invention may appear from the accompanying drawing, the subjoined detailed description and the appended claims.

In the drawing:

Figure 1 is a fragmentary longitudinal sectional view of our proportional sampler with the tubes in communication with each other.

Figure 2 is a view similar to Figure 1, but with the inner tube shown in a draining position.

Figure 3 is a view similar to Figure 2 and showing the inner tube in a filling position.

Figure 4 is a transverse sectional view taken on line 4--4 of Figure 3.

Figure 5 is a sectional view taken on line 5-5 of Figure 3.

Referring more particularly to the drawing, our proportional sampler consists of an outer tubular container I, the lower end of which is preferably tapered as shown at 2, and is provided with a central or axial outlet port 3. The outer container I is, therefore, similar to a test tube of special construction. An inner tubular container 4 is axially mounted within the container I, and is spaced from the inner wall of the container I to form an annular chamber 5. The volume of the chamber 5 is proportional to the volume of the inner container 4, and the purpose of this will be subsequently described.

The lower end of the container 4 is tapered as shown at 6, and this tapered end rests on a tapered seat I at the lower end of the container 1. A port 8 is provided in the lower end of the inner container 4, and this port can be rotated from one position to another for the purpose of communicating with the chamber 5, or with the outlet port 3, as will be subsequently described.

On one side of the outer container I, and adjacent the bottom thereof, we provide an outward projection to the wall of the container forming a bubble 9. When the port 8 is in the position shown in Figure 1, it communicates with the area of the bubble 9, thus enabling the fluid to readily pass from the chamber 5 into the inner container 4 until the fluid levels in the outer and inner containers balance.

A second enlargement indicated at In is provided in the outer container, and this latter passage communicates with the outlet port 3. When the inner container 4 is rotated so that the drain port 8 registers with the duct I0, then the fluid within the container 4 can be drained out of this inner container into a suitable vessel. Also in this same position of parts, as previously described, fluid can be drawn into the inner container 4 from a suitable vessel in the manner shown in Figure 3. Since the inner container 4 rests on a tapered seat, and since the bubble or ducts, 9 and I0, are limited in area, it is possible to establish communication between the containers I and 4 in only one position of the container 4, and also this fluid can be drained from, or introduced into the container 4 in only one position of that inner container.

Since the volume of the inner container, or pipette 4, has a known relation to the volume of the outer container or test tube I, it is possible to drain a known percentage of fluid from the container I, even though the exact volume of fluid within container I is not known.

Having described our invention we claim:

1. A proportional sampler comprising an outer container, an inner container radially spaced from the outer container to define an annular chamber between said containers, said outer container having an outlet duct therein, said inner container having an inlet port therein, said inner container being adjustable relative to the outer container to position the inlet port for communication with the annular chamber in one position of the inner container, and to register the inlet port with the outlet duct in another position of the inner container.

2. A proportional sampler comprising an outer container, an inner container spaced from the outer container and concentric therewith, a seat in the bottom of the outer container, said inner container resting on the seat, said outer container having an outlet duct in the bottom thereof and extending from said seat, said inner container having an inlet port therein, said inner container being adjustable on said seat to position the inlet port for communication with the outer container in one position of the inner container, and to register the inlet port with the outlet duct in another position of the inner container.

3. A proportional sampler comprising an outer tubular container, an inner tubular container spaced from the outer container to provide an annular chamber therebetween, a seat in the lower end of the outer container, said inner container resting on the seat, said inner container having an inlet port adjacent the bottom thereof, an enlargement on one side of the outer container adjacent said seat whereby a space is formed, said inner container being adjustable to position the inlet port in alignment with said enlargement, said outer container having an outlet duct extending from said seat, the inlet port being registerable with said duct in another position of the inner container.

4. A portional sampler comprising an outer tubular container, an inner tubular container spaced from the outer container and co-axial therewith, a tapered seat in the bottom of the outer container, said inner container resting on the seat, said outer container having an outlet duct formed therein extending from said seat, said inner container having an inlet port in the side thereof and adjacent the lower end, said inner container being rotatable to position the inlet port for communication with the outer container in one position of the inner container, and to register the inlet port with the outlet duct in another position of the inner container.

ALVIN S. BLUM. EUGENE V. WEINER.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 589,775 Akeson Sept. '7, 1897 1,556,911 Callender Oct. 13, 1925 2,149,303 Markwood Mar. 7, 1939 2,434,723 Shook Jan. 20. 1948 

